Cycling through windows in dual-screen

Submitted by Andrzej

Assigned to Olivier Fourdan @olivier

Link to original bug (#8865)

Description

Currently xfwm4 cycles through all the windows on current workspace.

While that's one possible design choice, other (arguably more convenient for users) would be to limit cycling to windows on the current screen as well. I think this warrants an option, perhaps ON by default.

Not sure which screen should be considered "active" - the one with a focused window, or the one with mouse cursor.

Another possible choice would be to display all available windows in several rows - one per screen. This could work nicely with the newly added cursor key navigation.

My subjective explanation: When I work with multiple screens I rarely think of them as a single common space - they "feel" more like separate workspaces to me. That mental model works reasonably well until I press Alt-Tab, which forces me to deal with all the additional windows from the other screen.